Improvement in thimbles



v E B. TOWLE.

THIMBLE.

No. 1'10;879. Patented Jan. 10, 1871.

double edge as usually made.

fiditiifill sum 7 Letters Patent No. 110,879,

IMPROVEMENT dated January 10, 1871.

IN THIMBLES.

The Schedule referred to in these Letters Patent and making pan of the same.

To all whom it may concern x I, EDWARD B. TOWLE, of N ewburyport, in the county of Essex and State of Massachusetts, have invent-ed a certain new and useful improved Solid-Edge Thimble, of which the following is a complete specification.

Nature and Object of the Invention.

The nature of my invention consists in so making a sheet-metal thimble that the solid edge shall be of solid metal instead of the usual folded or doubled edge, the object being to construct a thimble that is much more durable than one made in the ordinary manner.

Description of the Drawing.

Figure 1 shows a section of a thimble having a solid edge as made by my process.

Figure 2 shows a section of a thimhle having a Figure 3 represents the blank from which the thim- -ble is struck.

Figure 4 represents the thimble after it has undergone the first or swaging.

Figure 5 represents the thimble after it has undergone the second or drawing process, the mandrel being still within the thimble and the thimble being still within the draw-plate.

Figure 6 represents the thimble after having undergone the third or shaping process.

General Description.

The blank, fig. 3, is first made from any suitable metal, and oi' the size suitable for the thimble to be made. It is then swaged in the usual manner into thefforin shown in fig. 4.

After being made inthe form represented in fig. 4, it is placed. on a mandrel, A, and forced through the draw-plate B, which operation causes an accumulation of metal to form as shou-nby b b, which,.\vhen the thhnble is completed, becomes the reinforced or thickened edge.

The shaping of the thilnble is completed by stamping the thiinble into a -die, from which it takes the form representedin fig. 6.

In the common thhnble the reinforced edge is made by doubling the edge back onto itself. his method makes an incomplete article, as the doubled edge, in Y turning, is apt to be so much out as to separate the folded part and leave it free to come off after a little wear.

I claim as my invention- As a new article of manufacture, a thimble struck out; of sheet metal, with a solid edge or rim, substan- FRANK G. PARKER, FRANK H. NUTTER. 

